From Ursula K Leguin’s site… is José Saramago a SciFi writer and… does Ursula like William Golding’s work?:

It could be argued that José Saramago is the only science fiction writer to have been awarded a Nobel Prize. Or, since William Golding got one, that Saramago is the best science fiction writer to have been awarded a Nobel Prize. But then, what is science fiction? Gee, has anybody ever asked that question?